公开(公告)号：US10684341B2

公开(公告)日：2020-06-16

申请号：US16094907

申请日：2017-04-18

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Michael Gunter Helle ,  Thomas Lindner

IPC: G01R33/563 ,  A61B5/055 ,  G01R33/483

Abstract: A method of magnetic resonance imaging (100, 200) includes acquiring (300) tagged magnetic resonance data (144) by controlling the magnetic resonance imaging system with tagging pulse sequence commands (140). The tagging pulse sequence commands include a tagging inversion pulse portion (404) for spin labeling a tagging location (122, 122′) within a subject (118). The tagging pulse sequence commands comprise a phase-contrast readout portion (406) which phase-contrast encodes in at least one direction. The control pulse sequence commands include a control inversion pulse portion (500) and the phase-contrast readout portion. A tagged magnitude image (148) is reconstructed (304) using the tagged magnetic resonance data. A control magnitude image (150) is reconstructed (306) using the control magnetic resonance data. An arterial image (152) is reconstructed (308) by subtracting the control magnitude image and the tagged magnitude image. At least one phase image (156, 158, 160) is reconstructed (312) using either the tagged magnetic resonance data and/or the control magnetic resonance data.

公开(公告)号：US11410353B2

公开(公告)日：2022-08-09

申请号：US16767613

申请日：2018-11-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Michael Gunter Helle ,  Thomas Lindner

IPC: G06T11/00 ,  G01R33/48 ,  G01R33/56 ,  G01R33/563 ,  G06T7/00 ,  G06T15/08

Abstract: The invention provides for a medical imaging system (100, 300) comprising a processor (106) for controlling the medical imaging system. Execution of machine executable instructions (112) causes the processor to receive (200) a static angiographic image (114) of a region of interest (322), receive (202) a time series of angiographic images (116, 116′) of the region of interest, construct (204) an image mask (118) using the static angiographic image, determine (206) a time dependent signal (120) for each voxel within the image mask using the time series of angiographic images, construct (208) a composite angiographic image by: assigning (210) a fill time (126) to each voxel within the image mask using an extremum (124) of the time dependent signal if the extremum deviates from an average of the time dependent signal more than a predetermined threshold, and identifying (212) voxels within the image mask as being unfilled voxels.

公开(公告)号：US10677871B2

公开(公告)日：2020-06-09

申请号：US16094899

申请日：2017-04-10

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Michael Gunter Helle ,  Thomas Lindner

IPC: G01R33/563

Abstract: A medical imaging system (100, 1200) includes a memory (136) for storing machine executable instructions (170), and a processor (130) for controlling the medical imaging system. Execution of the machine executable instructions causes the processor to: receive (304, 1000) a tagged arterial spin labeled (ASL) magnitude image (148) of a region of interest of a subject (118); receive (306, 1002) a control ASL magnitude image (150) of the region of interest of the subject; construct (308, 1004) an arterial image (152) by subtracting the control ASL magnitude image and the tagged ASL magnitude image; construct (310, 1006) an arterial mask (154) using the arterial image by identifying arteries in the arterial image; receive (312, 1008) a phase contrast magnetic resonance image (156, 158, 160) of at least a portion of the region of interest of the subject; and construct a venous image (164) at least partially by setting voxels of the phase contrast image within the at least a portion of the region of interest that are within the arterial mask to a predetermined background value.

公开(公告)号：US11089970B2

公开(公告)日：2021-08-17

申请号：US15172204

申请日：2016-06-03

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Thomas Lindner ,  Michael Helle

IPC: A61B5/026 ,  G01R33/54 ,  G01R33/563 ,  A61B5/00 ,  G01R33/483

Abstract: A magnetic resonance imaging system (100) for acquiring magnetic resonance data (141) from an imaging zone (108) includes a memory (134, 136) for storing machine executable instructions (150, 152, 154, 156) and pulse sequence commands (140). The pulse sequence commands cause the magnetic resonance imaging system to provide at least one spatially selective saturation pulse (408, 410) to at least one selected volume (124, 124′) that is at least partially outside of a region of interest (123) and within the imaging zone. The magnetic resonance imaging system performs a non-selective inversion (412) of spins in the region of interest followed by a readout (414) of the magnetic resonance data which is reconstructed (202) into an image (142).

公开(公告)号：US20200294286A1

公开(公告)日：2020-09-17

申请号：US16767613

申请日：2017-11-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Michael Gunter Helle ,  Thomas Lindner

IPC: G06T11/00 ,  G01R33/563 ,  G01R33/56 ,  G01R33/48 ,  G06T15/08 ,  G06T7/00

Abstract: The invention provides for a medical imaging system (100, 300) comprising a processor (106) for controlling the medical imaging system. Execution of machine executable instructions (112) causes the processor to receive (200) a static angiographic image (114) of a region of interest (322), receive (202) a time series of angiographic images (116, 116′) of the region of interest, construct (204) an image mask (118) using the static angiographic image, determine (206) a time dependent signal (120) for each voxel within the image mask using the time series of angiographic images, construct (208) a composite angiographic image by: assigning (210) a fill time (126) to each voxel within the image mask using an extremum (124) of the time dependent signal if the extremum deviates from an average of the time dependent signal more than a predetermined threshold, and identifying (212) voxels within the image mask as being unfilled voxels.